Salp blooms drive strong increases in passive carbon export in the Southern Ocean.
Salp blooms drive strong increases in passive carbon export in the Southern Ocean.
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DOI：
10.1038/s41467-022-35204-6
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发表时间：
2023-02-02
影响因子：
16.6
通讯作者：
Pinkerton, Matt
中科院分区：
文献类型：
--
作者：
Decima, Moira;Stukel, Michael R.;Nodder, Scott D.;Gutierrez-Rodriguez, Andres;Selph, Karen E.;dos Santos, Adriana Lopes;Safi, Karl;Kelly, Thomas B.;Deans, Fenella;Morales, Sergio E.;Baltar, Federico;Latasa, Mikel;Gorbunov, Maxim Y.;Pinkerton, Matt
南大洋对全球生物碳泵(BCP)的贡献很大。南大洋的盐分，特别是桑普森盐分，是重要的食草动物，产生快速下沉的大型粪便颗粒。在这里，我们通过对比盐华存在/不存在的不同位置，来量化盐华对微生物动力学和BCP的影响。根据水团特征，盐华与以硅藻或裸藻为主的浮游植物相吻合。它们的捕食量与水华早期的微型浮游动物相当，导致初级生产力减少约1/3，浮游植物的负变化率与所有盐碱地有关。咸水中的颗粒出口总是更高，是非盐渍地区的2-8倍(平均5倍)，高达46%的初级产品从真光区出口。盐碱地的BCP效率从5%提高到28%，是全球海洋有记录以来最高的地区之一。形成胶状水华的浮游动物-盐分-改变微生物群落，使从表面向深处下沉的颗粒物流量增加五倍，大大增强了海洋隔离二氧化碳的能力。
The Southern Ocean contributes substantially to the global biological carbon pump (BCP). Salps in the Southern Ocean, in particular Salpa thompsoni, are important grazers that produce large, fast-sinking fecal pellets. Here, we quantify the salp bloom impacts on microbial dynamics and the BCP, by contrasting locations differing in salp bloom presence/absence. Salp blooms coincide with phytoplankton dominated by diatoms or prymnesiophytes, depending on water mass characteristics. Their grazing is comparable to microzooplankton during their early bloom, resulting in a decrease of ~1/3 of primary production, and negative phytoplankton rates of change are associated with all salp locations. Particle export in salp waters is always higher, ranging 2- to 8- fold (average 5-fold), compared to non-salp locations, exporting up to 46% of primary production out of the euphotic zone. BCP efficiency increases from 5 to 28% in salp areas, which is among the highest recorded in the global ocean. Gelatinous bloom-forming zooplankton—salps—alter microbial communities and quintuple the flux of sinking particles from the surface to the deep, strongly enhancing the ability of the ocean to sequester CO2.
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影响因子：
48
作者：
Callahan BJ;McMurdie PJ;Rosen MJ;Han AW;Johnson AJ;Holmes SP
通讯作者：
Holmes SP
影响因子：
4.9
作者：
Frolicher, Thomas L.;Sarmiento, Jorge L.;Winton, Michael
通讯作者：
Winton, Michael
影响因子：
4.4
作者：
Dell'Anno, A;Corinaldesi, C
通讯作者：
Corinaldesi, C
DOI：
10.1016/s0967-0645(02)00585-4
发表时间：
2003-01-01
影响因子：
3
作者：
Buesseler, KO;Barber, RT;Sambrotto, R
通讯作者：
Sambrotto, R
影响因子：
64.8
作者：
Atkinson, A;Siegel, V;Rothery, P
通讯作者：
Rothery, P